Hi Kuo-Jung,
On Wed, Feb 27, 2013 at 5:15 PM, Kuo-Jung Su <dant...@gmail.com> wrote:
> From: Kuo-Jung Su <dant...@faraday-tech.com>
>
> The FTDDRII030 is a DDRII SDRAM controller which is responsible for
> SDRAM initialization.
> In QEMU we emualte only the SDRAM enable function.
>
"emulate"
> Signed-off-by: Kuo-Jung Su <dant...@faraday-tech.com>
> ---
> hw/arm/Makefile.objs | 1 +
> hw/arm/faraday_a369_soc.c | 3 +
> hw/arm/ftddrii030.c | 171
> +++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 175 insertions(+)
> create mode 100644 hw/arm/ftddrii030.c
>
> diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
> index 33c9482..2a4c7d6 100644
> --- a/hw/arm/Makefile.objs
> +++ b/hw/arm/Makefile.objs
> @@ -39,3 +39,4 @@ obj-y += faraday_a369.o \
> faraday_a369_kpd.o
> obj-y += ftintc020.o
> obj-y += ftahbc020.o
> +obj-y += ftddrii030.o
> diff --git a/hw/arm/faraday_a369_soc.c b/hw/arm/faraday_a369_soc.c
> index e7343d9..fdf13f8 100644
> --- a/hw/arm/faraday_a369_soc.c
> +++ b/hw/arm/faraday_a369_soc.c
> @@ -148,6 +148,9 @@ a369soc_device_init(FaradaySoCState *s)
>
> /* ftahbc020 */
> s->ahbc = sysbus_create_simple("ftahbc020", 0x94000000, NULL);
> +
> + /* ftddrii030 */
> + s->ddrc = sysbus_create_simple("ftddrii030", 0x93100000, NULL);
> }
>
> static int a369soc_init(SysBusDevice *busdev)
> diff --git a/hw/arm/ftddrii030.c b/hw/arm/ftddrii030.c
> new file mode 100644
> index 0000000..1679bef
> --- /dev/null
> +++ b/hw/arm/ftddrii030.c
> @@ -0,0 +1,171 @@
> +/*
> + * Faraday DDRII controller
> + *
> + * Copyright (c) 2012 Faraday Technology
> + * Written by Dante Su <dant...@faraday-tech.com>
> + *
> + * This code is licensed under GNU GPL v2+
> + */
> +
> +#include "hw/hw.h"
> +#include "hw/sysbus.h"
> +#include "hw/devices.h"
> +#include "sysemu/sysemu.h"
> +
> +#include "faraday.h"
> +
> +#define REG_MCR 0x00 /* memory configuration register */
> +#define REG_MSR 0x04 /* memory status register */
> +#define REG_REVR 0x50 /* revision register */
> +
> +#define MSR_INIT_OK BIT(8) /* DDR2 initial is completed */
> +#define MSR_CMD_MRS BIT(0) /* start MRS command */
> +
> +#define CFG_REGSIZE (0x50 / 4)
> +
> +#define TYPE_FTDDRII030 "ftddrii030"
> +
> +typedef struct Ftddrii030State {
> + SysBusDevice busdev;
> + MemoryRegion iomem;
> +
> + /* HW register cache */
> + uint32_t regs[CFG_REGSIZE];
> +} Ftddrii030State;
> +
> +#define FTDDRII030(obj) \
> + OBJECT_CHECK(Ftddrii030State, obj, TYPE_FTDDRII030)
> +
> +#define DDR_REG32(s, off) \
> + *(uint32_t *)((uint8_t *)(s)->regs + (off))
Strange. You are forcing alignment in your memory region ops so Im not
sure I see the need for this. Cant you just index directly ...
> +
> +static uint64_t
> +ftddrii030_mem_read(void *opaque, hwaddr addr, unsigned size)
> +{
> + Ftddrii030State *s = FTDDRII030(opaque);
> + FaradaySoCState *soc = FARADAY_SOC_GET_CORE();
> + uint64_t ret = 0;
> +
> + if (soc->ddr_inited) {
> + DDR_REG32(s, REG_MSR) |= MSR_INIT_OK;
... like this?
s->regs[REG_MSR/4] |= MSR_INIT_OK
> + }
> +
> + switch (addr) {
> + case REG_MCR ... 0x4c:
s/0x4c/CFG_REGSIZE or something like it. I think you can define you
macros to get rid of this magic number that is really just the end of
your CFG_REGSIZE definition.
> + ret = s->regs[addr / 4];
> + break;
> + case REG_REVR:
> + ret = 0x100; /* rev. = 0.1.0 */
> + break;
> + default:
> + qemu_log_mask(LOG_GUEST_ERROR,
> + "ftddrii030: undefined memory access@0x%llx\n", addr);
> + break;
> + }
> +
> + return ret;
> +}
> +
> +static void
> +ftddrii030_mem_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
> +{
> + Ftddrii030State *s = FTDDRII030(opaque);
> + FaradaySoCState *soc = FARADAY_SOC_GET_CORE();
> +
> + switch (addr) {
> + case REG_MCR:
> + DDR_REG32(s, REG_MCR) = (uint32_t)val & 0xffff;
> + break;
> + case REG_MSR:
> + val = (val & 0x3f) | (DDR_REG32(s, REG_MSR) & MSR_INIT_OK);
> + if (!soc->ddr_inited && (val & MSR_CMD_MRS)) {
> + val &= ~MSR_CMD_MRS;
> + val |= MSR_INIT_OK;
> + memory_region_add_subregion(soc->as, soc->ram_base, soc->ram);
> + soc->ddr_inited = true;
> + }
> + DDR_REG32(s, REG_MSR) = (uint32_t)val;
> + break;
> + case 0x08 ... 0x4c: /* DDRII Timing, ECC ...etc. */
> + s->regs[addr / 4] = (uint32_t)val;
> + break;
> + default:
> + qemu_log_mask(LOG_GUEST_ERROR,
> + "ftddrii030: undefined memory access@0x%llx\n", addr);
> + break;
> + }
> +}
> +
> +static const MemoryRegionOps mmio_ops = {
> + .read = ftddrii030_mem_read,
> + .write = ftddrii030_mem_write,
> + .endianness = DEVICE_LITTLE_ENDIAN,
> + .valid = {
> + .min_access_size = 4,
> + .max_access_size = 4,
> + }
> +};
> +
> +static void ftddrii030_reset(DeviceState *ds)
> +{
> + SysBusDevice *busdev = SYS_BUS_DEVICE(ds);
> + Ftddrii030State *s = FTDDRII030(FROM_SYSBUS(Ftddrii030State, busdev));
> + FaradaySoCState *soc = FARADAY_SOC_GET_CORE();
> +
> + if (soc->ddr_inited && !soc->bi) {
> + memory_region_del_subregion(soc->as, soc->ram);
> + soc->ddr_inited = false;
> + }
> +
> + memset(s->regs, 0, sizeof(s->regs));
> +}
> +
> +static int ftddrii030_init(SysBusDevice *dev)
> +{
> + Ftddrii030State *s = FTDDRII030(FROM_SYSBUS(Ftddrii030State, dev));
> +
> + memory_region_init_io(&s->iomem,
> + &mmio_ops,
> + s,
> + TYPE_FTDDRII030,
> + 0x1000);
> + sysbus_init_mmio(dev, &s->iomem);
> + return 0;
> +}
> +
> +static const VMStateDescription vmstate_ftddrii030 = {
> + .name = TYPE_FTDDRII030,
> + .version_id = 1,
> + .minimum_version_id = 1,
> + .minimum_version_id_old = 1,
> + .fields = (VMStateField[]) {
> + VMSTATE_UINT32_ARRAY(regs, Ftddrii030State, CFG_REGSIZE),
> + VMSTATE_END_OF_LIST(),
> + }
> +};
> +
> +static void ftddrii030_class_init(ObjectClass *klass, void *data)
> +{
> + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
> + DeviceClass *dc = DEVICE_CLASS(klass);
> +
> + k->init = ftddrii030_init;
> + dc->desc = TYPE_FTDDRII030;
> + dc->vmsd = &vmstate_ftddrii030;
> + dc->reset = ftddrii030_reset;
> + dc->no_user = 1;
> +}
> +
> +static const TypeInfo ftddrii030_info = {
> + .name = TYPE_FTDDRII030,
> + .parent = TYPE_FARADAY_SOC,
> + .instance_size = sizeof(Ftddrii030State),
> + .class_init = ftddrii030_class_init,
> +};
> +
> +static void ftddrii030_register_types(void)
> +{
> + type_register_static(&ftddrii030_info);
> +}
> +
> +type_init(ftddrii030_register_types)
> --
> 1.7.9.5
>
>
